Closing the Inspector showing the information of the object being animated does not help solve the problem. Releasing the object prior to playing the game does help.

So I take it back, it's not ALL down to the rendering of the UI. Some of it is the background updating of the elements of the selected object(s).

As I say, releasing all objects and hitting play solves much of the performance problem. But makes editing animations impossibly, as an object needs to be selected in order to edit its animations, or its timeline locked.

Locking the timeline, releasing the object and then playing only the animation still has less than 30fps rendering of the animation. The timeline rendering seems to be somewhat of a problem.

This is terrible, just updated Mojave yesterday and My Mac Book air late 2015, is also running at half the speed in the editor, whether if it's in play mode or not. :S if you are a DEV DO NOT UPDATE TO MOJAVE

This is terrible, just updated Mojave yesterday and My Mac Book air late 2015, is also running at half the speed in the editor, whether if it's in play mode or not. :S if you are a DEV DO NOT UPDATE TO MOJAVE

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Downgrade. Backup everything.

Go to Mac Appstore and download Mac High Sierra Installer. it's about 4.8GB. Is a complete, fresh install.

I'm using the latest 2018.2 on one machine and the latest 2018.3 beta on another. Both are staying at 10.13.6, I'm not going near Mojave.

Mostly because it's impossible to do pixel perfect font rendering on Mojave. Ironic. This makes it full circle, from Macs being for Designers... to no longer giving a S*** about them and their concerns, at all.

Mostly because it's impossible to do pixel perfect font rendering on Mojave. Ironic. This makes it full circle, from Macs being for Designers... to no longer giving a S*** about them and their concerns, at all.

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I don't understand this comment, could you clarify it a bit? Also, have you tried 2017.4.12f1 as monofreely has suggested?

hi guys, i have updated to Mojave and hit the same problem, i have projects on older versions of Unity that i can't move to newer versions so really updating software is not an option, a project i am doing that renders at around 12k 60fps and i normally preview in the editor at 4k 60fps it was running at around 10fps in Mojave, after a bit of messing just unchecking the Metal Api Validation button in the player settings has gave me a massive performance increase?! no idea why, its stuttering a bit for 5 seconds when starting and then goes back to around 40-50fps, so not perfect but worth noting as it might cure your problems too?

also i think this is an Apple problem, i have had issues like this with previous OS updates, and most of my apps are now running terrible, Rider totally stops all the time mid typing now, its getting hard working coding at all now

hi guys, i have updated to Mojave and hit the same problem, i have projects on older versions of Unity that i can't move to newer versions so really updating software is not an option, a project i am doing that renders at around 12k 60fps and i normally preview in the editor at 4k 60fps it was running at around 10fps in Mojave, after a bit of messing just unchecking the Metal Api Validation button in the player settings has gave me a massive performance increase?! no idea why, its stuttering a bit for 5 seconds when starting and then goes back to around 40-50fps, so not perfect but worth noting as it might cure your problems too?

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damn you beat me to it and yeah I can confirm the fps is back to normal or at least 90% back to normal, no need to update to newest Unity versions nor reinstall High sierra or older MAC OS to fix this.

also i think this is an Apple problem, i have had issues like this with previous OS updates, and most of my apps are now running terrible, Rider totally stops all the time mid typing now, its getting hard working coding at all now

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Sorry. I should have also mentioned this.

Rider (and all text editors) really suffer unbelievably badly under Mojave. This is due to the "new" font rendering techniques in Mojave, which are a blend of lazy ways of achieving the dark theme propagating to how all fonts are rendered regardless of theme, and the changes made to make Marzipan work (iOS apps in macOS).

Essentially, they've gone from a CG (Core Graphics) focused rendering technique and technologies to a blend of it and CALayer rendering.

CALayer is always dynamic if there's any changes to the text, causing a much greater overhead. I think.

Plus CALayer font rendering is UGLY!!

And there's no way to entirely turn off the different types of anti-aliasing of CALayer, which is vastly inferior to that of how CG font rendering does it.

All ironic, because Steve Jobs went to ENORMOUS trouble to ensure all his Mac technologies had the best font rendering available, from way back in the days of Lisa.

I am not talking about disabling Metal, basically I have the same issue in 5.6, 2017 and 2018, what I had to do is go to player settings, click Metal Editor Support, but uncheck the Metal API Validation tick box, and this gave Unity most of its performance back. Rider is still a mess though sadly, so hoping maybe an update to the OS sorts that out?!

Got the same problem on 5.6.4 and 2018. It's really tooooooo slow, but Cpu is Low, Mem is Los.... After disable Collab, switch Graphics API Metal to OpenGL, may speed up a little.
Hope a Official Deep Solution.

@creativewax , Thanks a lot for your tip. Unchecking the Metal API Validation made it faster.

It seems like maybe things are starting to turn around with the Mojave update? I still haven't update to the new OS because of the fear of Unity not working well with it, I want to hear more feedback before I take the dive.

For everyone that had problem at first, where are you at now? is disabling the Metal API Validation all we really need to do? Is Mojave even really worth the update with the offsite of unity running slower? Am I just worrying to much?

I am also having this problem. Was quite happy Mac was getting a dark mode so I upgraded. If I had known it would do this to Unity I would not have bothered with it. Is there any chance of a statement from a Unity Dev on this please and if there will be a fix any time soon?

How's everyone's performance now that 2018.3 is out? Still font rendering issues?

I have been avoiding upgrading to Mojave because of concerns about Unity editor performance/reliability.

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I'm still on the fence myself about upgrading to Mojave because there hasn't been anyone on the forums that is saying that it working just fine. I figured it's just because most people only go the the forums when something is wrong and people don't usually go back to update when things run smooth again.

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